<template>
    <div>
        {{ message }}
        <button @click="greet()">问候</button>
        
    </div>

</template>

<script>
export default{
    data(){
        return{
            message:'hello,friends!'
        }
    },
    methods:{
        greet(){
            this.message='hello,'+ this.$attrs.name+'!'
        }
    }
}</script>